UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F/A AMENDMENT NO. 1 [Check one] o

                    REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 OR x

                    ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d)
                        OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended

                    December
                        31, 2006

                    Commission File Number

                    000-30514ARC ENERGY TRUST(Exact name of Registrant as specified in its
                        charter)N/A(Translation of Registrant's name into English (if
                        applicable))ALBERTA(Province or other jurisdiction of incorporation or
                        organization)1311(Primary Standard Industrial Classification Code Number (if
                        applicable))NOT APPLICABLE(I.R.S. Employer Identification Number (if
                        applicable))2100, 440 2nd Avenue S.W., Calgary,
                            Alberta, Canada T2P 5E9 (403) 503-8600(Address and telephone number of Registrant's principal
                        executive offices)Corporation Service Company, 2711 Centerville Road,
                            Suite 400, Wilmington, Delaware 19805 (302) 636-5401(Name, address (including zip code) and telephone number
                        (including area code)of agent for service in the United States)Securities registered or to be registered pursuant to
                        Section 12(b) of the Act.Title of each class

                    

                    Name of each exchange on which registeredN/A

                    N/ASecurities registered or to be registered pursuant to
                        Section 12(g) of the Act.TRUST UNITS

                        (Title of Class)(Title of Class)Securities for which there is a reporting obligation
                        pursuant to Section 15(d) of the Act.N/A

                        (Title of Class)      - 2
            -   For
            annual reports, indicate by check mark the information filed with this Form: x

                    Annual information form

                    x

                    Audited annual financial statements Indicate the number of outstanding shares of each of the issuer's
            classes of capital or common stock as of the close of the period covered by the annual
            report. 204,288,609 Trust Units as at December 31, 2006 Indicate by check mark whether the Registrant by filing the information
            contained in this Form is also thereby furnishing the information to the Commission
            pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934 (the "Exchange
            Act"). If "Yes" is marked, indicate the file number assigned to the Registrant in
            connection with such Rule. o
            Yes
            82-_________      No
            x Indicate by check mark whether the Registrant (1) has filed all reports
            required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12
            months (or for such shorter period that the Registrant was required to file such
            reports) and (2) has been subject to such filing requirements for the past 90
            days. x Yes

                    o No      - 3
            -   Explanatory Note This Amendment No. 1 to the Annual Report of ARC Energy Trust (the
            "Registrant") on Form 40-F for the fiscal year ended December 31, 2006 is filed
            herewith for the purposes stated under the heading "Interpretive Note to Readers in
            Relation to Principal Documents" as set forth immediately below. This Amendment No. 1 consists of a cover page, this explanatory note,
            the Interpretive Note to Readers in Relation to Principal Documents, the signature page
            and new certifications by the principal executive and principal financial officers of
            the Registrant. Other than as expressly set forth above, this Amendment No. 1 does not
            update or restate the information in any Item of the Form 40-F or reflect any events
            that have occurred after the Form 40-F was filed. Interpretive Note to Readers in Relation to Principal
            Documents The
            following note to readers has been included in this Form 40-F/A to provide a prominent
            reference to and identify the use of certain financial measures which do not have any
            standardized meaning prescribed by Canadian generally accepted accounting principles
            (referred to as "Non-GAAP Measures") and which occur in the Principal Documents were
            filed as part of the Annual Report on Form 40-F, and more particularly in the Annual
            Information Form, see Exhibit 99.1 of the Annual Report on Form 40-F, the Audited
            Annual Financial Statements, see Exhibit 99.2 of the Annual Report on Form 40-F, and
            Management's Discussion and Analysis and Results of Operations, see Exhibit 99.3 of the
            Annual Report on Form 40-F. In the case of the Audited Annual Financial Statements, we
            have set forth below a specific reference to the location of certain Non-GAAP Measures,
            along with a brief explanation of the use of such Non-GAAP Measures and reference to
            the closest GAAP measure. In the case of the Management's Discussion and Analysis and
            Results of Operations and the Annual Information Form, we have included in chart form
            the specific location of each Non-GAAP Measure, along with the specific Non-GAAP
            Measures included in the section. This note is intended to bring the readers' attention to the use of
            Non-GAAP Measures and in order to provide better clarity. Readers are specifically
            requested to review the information carefully. Audited Annual Financial Statements Note 17 of the Audited Annual Financial Statements (Exhibit 99.2) refers
            to a reconciliation of cash flow and distributions and may constitute a Non-GAAP
            Measure because of the inclusion in cash distributions of non-cash amounts. The
            non-cash amounts occur because of concurrent re-investments of cash distributed to
            unitholders pursuant to the Distribution Reinvestment Program, under which unitholders
            have the right to acquire additional Trust Units on a monthly basis with cash
            distributions. In particular reference is made to "cash distributions", "accumulated
            cash distributions, beginning of year", "accumulated cash distributions, end of year",
            "cash distributions per unit", "accumulated cash distributions per unit, beginning of
            year", and "accumulated cash distributions per unit, end of year", all of which may be
            considered to be Non-GAAP Measures because of the inclusion of non-cash amounts of
            $94.6 million for the year ending December 31, 2006 and of $58.3 million for the year
            ended December 31, 2005. Reference is made to "Consolidated Statement of Cash flows" in
            the Annual Audited Financial Statements for additional information as to cash
            distributions. Management's Discussion and Analysis and Results of Operations
            ("MD&A") & Annual Information Form ("AIF") The
            references in the following chart to HEADINGS refer to the paragraph headings in the
            MD&A (Exhibit 99.3) and AIF (Exhibit 99.1) and follow the same order of
            presentation as in the MD&A and AIF and the SPECIFIC REFERENCES identify the nature
            of the "Non-GAAP Measures" within such paragraphs. Readers should refer to NON-GAAP MEASURES in the MD&A and SPECIAL
            NOTES TO READER – DESCRIPTION OF CASH FLOW in the AIF for a reconciliation of
            Non-GAAP Measures such as "Cash flow", "Cash flow from operations", "Cash flow per
            unit" and "Cash flow from operations per unit" identified in the chart below under the
            heading SPECIFIC REFERENCES to "Cash flow from operating activities" as prescribed by
            GAAP. Readers should also note that these Non-GAAP Measures do not reflect all
            operating cash activity for the periods described.      - 4
            -   Readers should refer to the above section "Audited Annual Financial
            Statements" for further information on all references to "Cash distributions", "Cash
            distributions per unit", "Accumulated Cash Distributions", and "Accumulated Cash
            Distributions per unit" in the MD&A and AIF identified in the chart below under the
            heading SPECIFIC REFERENCES for an explanation of how these items may constitute
            Non-GAAP Measures because of the inclusion of non-cash amounts. Management’s Discussion and Analysis and Results of
                        OperationsHEADING

                    SPECIFIC REFERENCESNON-GAAP MEASURES

                    All of this information comprises an interpretive note
                        designed to assist the reader in reconciling the use of certain Non-GAAP
                        Measures, including particularly "Cash flow", "Cash flow from operations"
                        and "Cash flow from operations per unit", to the GAAP measures and more
                        particular "Cash flow from operating activities" which is a GAAP term found
                        on the Consolidated Statement of Cash flows in the Annual Audited Financial
                        Statements.FOURTH QUARTER FINANCIAL AND OPERATIONAL RESULTS

                    Reference is made to "Cash flow"Reference is made to "Cash flow from operations" and a
                        reference to "Capital funded with Cash flow (per cent)" in this
                        tableReference is made to "Cash distributions"2006 ANNUAL FINANCIAL AND OPERATIONAL RESULTS

                    Reference is made to "Cash flow from operations" and "Cash
                        from operations per unit"Reference is made to "Payout ratio per unit" and note
                        thereto reading "Based on cash distributions divided by Cash flow from
                        operations"CASH FLOW FROM OPERATIONS

                    Reference is made to "Cash flow", and "Cash flow from
                        operations" in the text and "Cash flow from Operations" in the
                        tableRISK MANAGEMENT AND HEDGING ACTIVITIES

                    Reference is made to "Cash flow"Reference is made to "cash distributions"WHOLE TRUST UNIT INCENTIVE PLAN ("WHOLE UNIT
                        PLAN")

                    Reference is made to "Cash flow from operations" in Note (3)
                        of the table titled "Value of Whole Unit Plan as at December 31,
                        2006"FOREIGN EXCHANGE GAINS AND LOSSES

                    Reference is made to "Cash flow" in the opening
                        paragraph.CAPITAL EXPENDITURES AND NET ACQUISITIONS

                    Reference is made to "Cash flow from operations" in the
                        paragraph following the sub-heading "Capital Expenditures" and to "Cash
                        flow" in the table titled "Sourcing of Funding of Capital Expenditures and
                        Net Acquisitions"CAPITALIZATION, FINANCIAL AND RESOURCES AND
                        LIQUIDITY

                    Reference is made to "Net debt to Cash flow" and the table
                        titled "Capital Structure and Liquidity" and other references to "Cash flow
                        from operations" and "Cash flow"       - 5
            -    CASH DISTRIBUTIONS

                    Reference is made to "cash distributions" and "cash
                        distributions per unit"Reference is made to "Cash flow" and "Cash flow from
                        operations"DEFICIT

                    Reference is made to "cash distributions" and "accumulated
                        cash distributions"Reference is made to "Cash flow"CONTRACTUAL OBLIGATIONS AND COMMITMENTS

                    References to "Cash flow" and "Cash flow from
                        operations"OBJECTIVES AND 2007 OUTLOOK

                    Reference is made to "cash distributions" and "cash
                        distributions per unit"Reference is made to "Cash flow" and "Cash flow from
                        operations"2007 CASH FLOW SENSITIVITY

                    Reference is made to "Cash flow"ASSESSMENT OF BUSINESS RISKS

                    Reference is made to "Cash flow"ANNUAL HISTORICAL REVIEW

                    Reference is made to "Cash flow"Reference is made to "cash distributions"QUARTERLY HISTORICAL REVIEW

                    Reference is made to "Cash flow"Reference is made to "cash distributions"Annual Information FormHEADING

                    SPECIFIC REFERENCESPECIAL NOTES TO READER - DESCRIPTION OF CASH
                        FLOW

                    All of this information comprises an interpretive note
                        designed to assist the reader in reconciling the use of certain Non-GAAP
                        Measures, including particularly "Cash flow", "Cash flow from operations"
                        and "Cash flow from operations per unit", to the GAAP measures and more
                        particular "Cash flow from operating activities" which is a GAAP term found
                        on the Consolidated Statement of Cash flows in the Annual Audited Financial
                        Statements.OUR BUSINESS - OVERVIEW

                    Reference is made to "Cash flow"Reference is made to "cash distributions"OUR BUSINESS - PROPOSED FEDERAL TAX CHANGES

                    Reference is made to "cash distributions"OUR BUSINESS - OUR ORGANIZATIONAL STRUCTURE

                    Reference is made to "Cash flows"       - 6
            -    OUR BUSINESS - CASH DISTRIBUTIONS AND DISTRIBUTION
                        POLICY

                    Reference is made to "cash distributions"Reference is made to "Cash flow"STATEMENT OF RESERVES DATA AND OTHER OIL AND GAS INFORMATION
                        – DEFINITIONS AND NOTES TO RESERVE DATA TABLES, NOTE 7 - FUTURE
                        DEVELOPMENT COSTS

                    Reference is made to "Cash flow"STATEMENT OF RESERVES DATA AND OTHER OIL AND GAS INFORMATION
                        - ADDITIONAL INFORMATION CONCERNING ABANDONMENT AND RECLAMATION
                        COSTS

                    Reference is made to "Cash flow"SHARE CAPITAL OF ARC RESOURCES - EXCHANGEABLE
                        SHARES

                    Reference is made to "cash distributions"OUR INFORMATION - TRUSTEE

                    Reference is made to "cash distributions"OUR INFORMATION - DISTRIBUTION REINVESTMENT AND OPTIONAL
                        TRUST UNIT PURCHASE PLAN)

                    Reference is made to "cash distributions"DISTRIBUTIONS TO UNITHOLDERS

                    Reference is made to "cash distributions"RISK FACTORS - PROPOSED FEDERAL TAX CHANGES

                    Reference is made to "cash distributions"RISK FACTORS - RESERVE ESTIMATES

                    Reference is made to "Cash flows"RISK FACTORS - PURCHASE OF PROPERTIES

                    Reference is made to "Cash flow"RISK FACTORS -MAINTENANCE OF DISTRIBUTIONS

                    Reference is made to "Cash flow"RISK FACTORS - ADDITIONAL FINANCING

                    Reference is made to "Cash flow"RISK FACTORS - DELAY IN CASH DISTRIBUTIONS

                    Reference is made to "cash distributions" in
                        headingRISK FACTORS - DEPLETION OF RESERVES

                    Reference is made to "Cash flow"RISK FACTORS - RETURN OF CAPITAL

                    Reference is made to "cash distributions"       - 7
            -   UNDERTAKING AND CONSENT TO SERVICE OF PROCESS A.

                    Undertaking The
            Registrant undertakes to make available, in person or by telephone, representatives to
            respond to inquiries made by the Commission staff, and to furnish promptly, when
            requested to do so by the Commission staff, information relating to: the securities
            registered pursuant to Form 40-F; the securities in relation to which the obligation to
            file an annual report on Form 40-F arises; or transactions in said
            securities. B.

                    Consent to Service of Process A
            Form F-X signed by the Registrant and its agent for service of process was previously
            filed with the Commission in connection with the Trust Units. Any
            change to the name and address of the agent for service for service of process of the
            Registrant shall be communicated promptly to the Securities and Exchange Commission by
            an amendment to the Form F-X referencing the file number of the relevant
            registration statement.      - 8
            -   SIGNATURES Pursuant to the requirements of the Exchange Act, the Registrant
            certifies that it meets all of the requirements for filing on Form 40-F and has duly
            caused this Amendment No. 1 to its Annual Report on Form 40-F/A to be signed on its
            behalf by the undersigned, thereto duly authorized. ARC ENERGY
                        TRUST(the Registrant)By:

                    signed "John P.
                        Dielwart"John P. DielwartPresident and Chief Executive Officer Date: December 3, 2007      - 9
            -   Index to Exhibits Exhibit Number

                    Description99.1*

                    Annual Information
                        Form for the fiscal year ended December 31, 2006.99.2*

                    Consolidated Financial Statements for the fiscal year ended
                        December 31, 2006 (note 22 to the Consolidated Financial Statements
                        relates to the United States Generally Accepted Accounting Principles (U.S.
                        GAAP)).99.3*

                    Management's Discussion and Analysis and Results of
                        Operations for the fiscal year ended December 31, 2006.99.4

                    Certifications of
                        Chief Executive Officer pursuant to Rule 13a-14(a) or 15d-14 of the
                        Securities Exchange Act of 1934.99.5

                    Certifications of Chief Financial Officer pursuant to Rule
                        13a-14(a) or 15d-14 of the Securities Exchange Act of 1934.99.6

                    Certifications of Chief Executive Officer pursuant to Rule
                        13(a)-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States
                        Code (18 U.S.C. 1350).99.7

                    Certifications of Chief Financial Officer pursuant to Rule
                        13(a)-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States
                        Code (18 U.S.C. 1350).99.8*

                    Consent of Deloitte & Touche LLP, Independent Registered
                        Chartered Accountants.99.9*

                    Consent of GLJ Petroleum Consultants Ltd. to the inclusion
                        of the Report dated February 2, 2007 evaluating the reserves of ARC
                        Resources Ltd. and ARC (Sask.) Energy Trust.*

                    Previously filed under cover of Form 40-F for the fiscal
                        year ended December 31, 2006 as filed on EDGAR on March 29,
                        2007.